Devtools

All tools
List of tools tagged as Devtools
CSS Border Radius Generator
Generate border-radius CSS from corner values, slash syntax, and preview dimensions with fit warnings, Tailwind output, and copy-ready code.
CSS Box Shadow Generator
Build a CSS box-shadow stack with editable layers, live surface previews, CSS/SCSS output, and a ledger for checking each shadow.
CSS Flexbox Generator
Generate flexbox CSS for responsive rows, columns, wrapping, gaps, and child sizing with a live preview, property notes, and starter HTML.
CSS Grid Generator
Generate CSS Grid layout rules from a selector, strategy, gaps, and alignment, with a live preview, fit projections, scaffold, and audit ledgers.
JSON Schema Generator
Generate a draft-aware JSON Schema from sample JSON in your browser, with required-field choices, nullable handling, and review ledgers.
README Generator
Draft a README from project details, setup commands, usage examples, and license choices with readiness checks and follow-up repository tasks.
Test Data Generator
Generate repeatable synthetic test rows from field recipes and seeds, then export CSV, JSON, NDJSON, or SQL with recipe quality checks.
Web App Manifest Generator
Generate a web app manifest with install markup, icon asset checks, and warnings for launch scope, display mode, colors, and shortcuts.
.env File Generator
Turn key-value rows into reviewed .env and .env.example files with quote safety checks, duplicate-key warnings, and masked secret previews.
.gitignore Generator
Draft a repository-ready .gitignore from stack, OS, editor, secret, and exception choices, with warnings for broad or duplicate patterns.
.gitignore Pattern Coverage Checker
Check whether .gitignore rules protect generated or sensitive paths, with in-browser coverage metrics for negations, tracked files, and gaps.
API Key Generator
Generate API keys in your browser with public IDs, entropy checks, check segments, storage hashes, and sensitive-batch warnings.
API Pagination Window Calculator
Calculate an API pagination window from item counts, page caps, rate limits, latency, and workers, with shard timing and page-size tradeoff charts.
Acceptance Criteria Generator
Draft acceptance criteria from a story, actor, outcomes, behaviors, and edge cases with Gherkin, review checks, and exportable ledgers.
Application Log Pattern Analyzer
Analyze application log excerpts in your browser, group repeated failure patterns, and review severity counts, time buckets, and triage rows.
Application Programming Interface (API) Testing Tool
Test an HTTP API directly from your browser, import cURL commands, inspect CORS-blocked failures, and save clean response traces.
Attenuator Pad Calculator
Calculate Pi or T attenuator pad values for matched RF, video, or audio lines, then check preferred resistor rounding and wattage.
Avro Schema Compatibility Validator
Compare released and proposed Avro schemas by compatibility mode, with field-level blockers, alias/default checks, and registry-ready notes.
Base64 Encoder and Decoder
Encode or decode Base64 text and files in your browser with URL-safe output, padding repair, byte inspection, and Data URL support.
Binary Decimal Hex Converter
Convert an integer between binary, decimal, hex, octal, and Base36 while checking signed widths, byte order, bit fields, and wrap.
Bitwise Operations Calculator
Calculate bitwise masks, shifts, rotations, and flags with fixed-width binary, hex, signed readouts, bit maps, width audits, and density charts.
Bug Report Generator
Turn bug details into tracker-ready Markdown, triage fields, JSON, and a reproducibility checklist with severity and privacy review notes.
Build Artifact Storage Calculator
Estimate retained CI artifact storage from build cadence, refs, retention, compression, caches, reserve allowance, and quota headroom.
CI Failure Log Analyzer
Analyze a failed CI job log, rank line-numbered failure clues, group stages, suggest next checks, and mask secret-like snippets before sharing.
CODEOWNERS Coverage Analyzer
Check CODEOWNERS coverage for changed files, flag missing, ownerless, or catch-all ownership gaps, and build a review-ready fix queue.
CSS Gradient Generator
Generate CSS gradients with live geometry, draggable color stops, modern color-space choices, syntax warnings, and copy-ready CSS output.
CSS Minifier
Minify CSS in your browser, keep token-sensitive syntax intact, compare byte savings, and catch parser or handoff warnings before release.
Case Converter
Convert headings, labels, filenames, and identifiers into 13 case styles with line-by-line conversion, acronym control, and accent-folded slugs.
Changelog Generator
Draft a changelog from notes, Markdown sections, or Conventional Commit subjects with Keep a Changelog grouping, SemVer cues, and copy-ready Markdown.
Comma-Separated Values (CSV) Converter
Convert CSV-like text into previews, profiles, and reusable exports in your browser while checking headers, delimiters, types, and row warnings.
Conventional Commit Messages Checker
Check Conventional Commit headers or full messages, find format issues, and map valid changes to major, minor, patch, or no release impact.
Credit Card Number Generator
Generate sandbox payment card numbers with Luhn checks, custom BIN/IIN options, seeded batches, optional CVV or expiry, and prefix reports.
DOCX Converter
Convert a DOCX in your browser into clean HTML, Markdown, text, and audit-friendly exports with package checks, warnings, and image controls.
Dependency License Flags Checker
Check dependency license evidence against allowed, review, and denied policies with SPDX expression triage, scope filters, risk scores, and review queues.
Dependency Update Risk Analyzer
Triage dependency update rows by SemVer change, runtime scope, security, tests, and compatibility so risky upgrades enter owner review.
Docker Compose Generator
Build Docker Compose YAML for a service, then review image or build choices, port exposure, secrets, healthchecks, networks, and volumes.
Dockerfile Generator
Build a Dockerfile and .dockerignore for Node.js, Python, Go, or Java services with cache mounts, health checks, and hardening warnings.
Duplicate Line Remover
Remove repeated lines from pasted text or a local text file, tune case and whitespace matching, and audit kept rows with metrics and a ledger.
ENV Converter
Convert .env files into YAML, JSON, runtime env, INI, and properties output while checking parsed lines, expansion gaps, and secret-like values.
Environment Variable Inventory Checker
Check environment variables against a required list and get redacted findings for missing, blank, duplicate, placeholder, and secret-like entries.
Extensible Markup Language (XML) Converter
Convert XML in your browser into JSON, JSON Lines, tables, SQL inserts, and formatted XML with record-path checks and schema clues.
Favicon Generator
Generate favicon PNGs, favicon.ico, HTML links, and manifest icons from one image with local processing, size checks, and previews.
Feature Flag Cleanup Checker
Audit feature flag inventories for stale, expired, ownerless, dependency-blocked, and code-referenced flags with a prioritized cleanup queue.
File and Disk Size Converter
Convert file and disk sizes across decimal and IEC units, then estimate usable capacity, allocation slack, and the first common storage tier.
Filebeat Grok Pattern Generator
Generate a Filebeat Grok pattern from one sample log line, with ECS field mapping, sample-match coverage, and optional ingest pipeline JSON.
Fuel Efficiency Converter
Convert fuel efficiency between MPG (US), L/100 km, and km/L with direction cues, unusual-value warnings, rounded equivalents, and charted sensitivity.
Git Branch Staleness Analyzer
Audit Git branch inventories locally with age, merge, protection, ahead/behind, and gone-upstream signals before deleting stale branches.
Git Diff Risk Analyzer
Analyze Git diff summaries before review, highlighting churn, sensitive paths, deletion pressure, generated files, and binary changes.
GitHub Actions Matrix Generator
Generate GitHub Actions matrix workflow YAML with runtime and runner axes, cache choices, include/exclude rows, and review checks.
GraphQL Formatter
Format GraphQL queries, fragments, and schema SDL locally, compare readable and compact output, and catch bracket or role warnings before handoff.
Gzip Compression Checker
Check HTTP compression evidence for a URL or pasted headers, including gzip/Brotli selection, cache variation, and byte-savings risk.
Gzip Text Decompressor
Decompress gzip, zlib, and raw deflate text locally from Base64, hex, escaped bytes, or files with wrapper checks and byte evidence.
HCL Converter
Convert HCL or Terraform config in your browser into YAML, JSON, and flat key-value views with path ledgers and schema drift checks.
HMAC Generator
Generate HMAC signatures in your browser from text or local files, with SHA, RIPEMD, legacy MD5, byte encodings, prefixes, and match checks.
HTML Boilerplate Generator
Generate an HTML starter document with title, language, metadata, asset paths, warnings, and copy-ready head or full-page markup.
HTML Entity Lookup
Find the right HTML entity for a symbol, name, or code point, with alias checks, Unicode bytes, and paste forms for HTML, CSS, JavaScript, and URLs.
HTML Escape and Unescape Tool
Escape HTML snippets in your browser or decode entities back to text with context profiles, pass-by-pass logs, and copy-safety warnings.
HTML Minifier
Minify HTML in your browser, compare byte savings, and review spacing, comments, raw-text blocks, and attribute risks before copying.
HTML Tag Stripper
Turn HTML fragments, emails, or pages into browser-local plain text with spacing controls, safe URL checks, image-alt handling, and review tables.
HTML Unescaper
Decode escaped HTML text or small files in your browser, inspect each entity change, and flag unresolved or script-shaped output.
HTML to JSX Converter
Turn pasted or loaded HTML and SVG into JSX locally, with React attribute fixes, style objects, event warnings, and migration checks.
HTML to Markdown Converter
Convert pasted or loaded HTML into readable Markdown in your browser, with dialect choices, table safeguards, warnings, and reviewable exports.
Heatsink Thermal Resistance Calculator
Calculate the heat-sink thermal resistance budget from device power, junction limit, interface loss, ambient heat, and airflow context.
Helm Values Schema Validator
Validate values.yaml against values.schema.json, with Helm-style failure details, schema coverage, hygiene warnings, and a CI command snippet.
Hreflang Tag Generator
Build hreflang clusters from locale URL rows, then copy head tags, sitemap XML, or HTTP headers with audits for self-reference and x-default.
INI Converter
Convert INI or CFG text in your browser into JSON, YAML, properties, environment-variable text, and normalized INI with parser checks.
IP Address to Decimal Converter
Convert an IPv4 address or 32-bit integer into decimal, plus hex, binary, mapped IPv6, range labels, and octet-weight checks.
JSON Converter
Turn messy JSON or JSON Lines into clean tables, branch-aware previews, and safer handoff files with path and precision checks in your browser.
JSON Diff Comparator
Compare two JSON payloads in your browser, review path-level changes, tune array matching, ignore noisy fields, and export audit evidence.
JSON Formatter
Format JSON in your browser into readable, compact, line-stream, and sorted outputs with duplicate-key, number precision, and size checks.
JSON Repair Tool
Turn broken JSON-like paste into strict JSON in your browser, with repair evidence for comments, wrappers, loose literals, and precision risks.
JSON Schema Breaking Changes Checker
Check JSON Schema changes in your browser, flag required-field, type, enum, constraint, closure, and $ref risks, and export evidence.
JSON Sorter
Turn messy JSON into repeatable key order in your browser, with JSONC cleanup, duplicate-key warnings, path review, and array-order controls.
JSON Validator
Validate JSON, JSONC, JSON5, or JSON Lines locally, then inspect syntax errors, duplicate keys, precision risks, and formatted output.
JSON to CSV Converter
Turn nested JSON or JSON Lines into clean CSV or TSV, with record-path selection, flattened headers, previews, and spreadsheet formula checks.
JSON to TypeScript Converter
Turn messy JSON or JSON Lines samples into TypeScript declarations with optional-field evidence, null handling, guard code, and review notes.
JSON-LD Generator
Generate JSON-LD structured data for Article, Product, Organization, and FAQ pages with visible-content checks and copy-ready markup.
JSONPath Tester
Test JSONPath selectors on pasted or loaded JSON locally, compare matched values with paths and JSON Pointers, and check filter or syntax issues.
JUnit Test Report Analyzer
Analyze JUnit XML from CI runs in your browser with pass-rate gates, failure triage, retry clues, skipped cases, and slow-test flags.
JWT Decoder
Decode a compact or Bearer JWT in your browser, inspect readable claims, and review timing, issuer, audience, signature, and sensitive-claim warnings.
JavaScript Minifier
Minify JavaScript in your browser, review syntax feedback and gzip savings, and choose safer settings for modules, comments, and source maps.
Key-Value Config Converter
Convert INI, .properties, and .env text into JSON, YAML, or handoff config with a key ledger, duplicate checks, and local parsing.
Large Language Model (LLM) Usage Cost Calculator
Estimate LLM API spend from prompt and output tokens, retries, cache hits, fixed fees, and budget caps with model price comparisons.
MAC Address Generator
Generate MAC address batches for labs and fixtures with prefixes, local/unicast flag control, seeded replay, uniqueness checks, and exportable results.
Markdown Previewer
Review Markdown before publishing with GFM or CommonMark rendering, raw-HTML handling, safe links, heading anchors, and local exports.
Markdown Table Generator
Generate a GitHub-style Markdown table from CSV, TSV, semicolon, or pipe data with header detection, pipe escaping, column audits, and exports.
Markdown to HTML Converter
Convert Markdown into reviewable HTML with a sanitized preview, conversion ledger, and raw-HTML or external-link warnings before publishing.
Meta Tag Generator
Generate search and social meta tags from page details, with canonical URL checks, robots warnings, preview image validation, and copy-ready markup.
Microstrip Impedance Calculator
Estimate single-ended PCB microstrip impedance or solve target trace width from stackup geometry, Dk presets, model comparison, and tolerance checks.
Netcat Command Generator
Build netcat or ncat commands for authorized connect, listen, scan, TLS, proxy, and transfer tasks with shell-aware quoting and warnings.
Op-Amp Gain Calculator
Calculate op-amp gain for common feedback circuits, solve missing resistors, and check rail swing, bandwidth, slew rate, tolerance, and load current.
Open Graph Tag Generator
Build Open Graph and X card meta tags from page details, preview images, article data, and crawler warnings before copying head markup.
Open Graph Tag Previewer
Preview social share cards from pasted HTML or a public URL, then review Open Graph, X card, image, canonical, and crawler warnings.
OpenAPI Operation Coverage Checker
Check OpenAPI operation coverage against test evidence, spot missing or unmatched routes, and turn release-gate gaps into an owner-ready queue.
Properties Converter
Convert Java .properties text into safer handoff formats, with duplicate-key warnings, path checks, and browser-side parsing.
Pull Request Cycle Time Calculator
Calculate pull request cycle time from PR CSV timestamps, compare pickup delay and slow-tail percentiles, and export ledgers, charts, and JSON.
Quick Response (QR) Code Generator
Build QR codes for links, Wi-Fi, contacts, messages, and events with scan-readiness scoring, logo checks, and downloadable images.
Rate Limit Backoff Schedule Calculator
Plan a rate-limit retry schedule with Retry-After floors, jitter windows, pacing math, timeout checks, and shared-client safety notes.
Regex Sample Matches Checker
Test JavaScript regex patterns against accepted and rejected samples, with whole-line mode, match spans, timeout limits, and exportable verdicts.
Regex Tester
Test a JavaScript regex against sample text, inspect match spans and capture groups, catch timeout warnings, and preview replacements.
Release Notes Generator
Turn commits, PR lists, or release bullets into grouped release notes with readiness warnings, change ledgers, and exportable drafts.
Resistor Combination Finder
Find resistor combinations for a target value, compare series, parallel, and mixed matches, and check tolerance plus part power stress.
Robots.txt Generator
Build a robots.txt file from crawler sections, path rules, sitemap hints, and imports, then review crawl-policy warnings before publishing.
SARIF Security Findings Analyzer
Analyze SARIF security logs in your browser with release-gate counts, priority findings, rule and file hotspots, and fingerprint warnings.
SBOM Component Risk Analyzer
Review SBOM component risk from CycloneDX, SPDX, Syft, or CSV data, ranking vulnerabilities, license gaps, weak identity, and policy findings.
SCSS to CSS Compiler
Compile SCSS, indented Sass, or plain CSS in your browser, then review compiled CSS, source-map output, metrics, and audit warnings.
SQL Formatter
Format pasted SQL or a local file for database review, with dialect-aware layout, caveat warnings, statement metrics, and audit exports.
SQL INSERT Generator
Generate SQL INSERT scripts from pasted rows or local CSV files with dialect quoting, literal typing, delimiter detection, and row and column review.
SQLite Manager
Inspect a local SQLite file in your browser, run SQL, make careful rowid-table edits, and export rows, SQL dumps, or a database copy.
SVG Placeholder Generator
Build SVG placeholders with exact canvas sizes, readable labels, contrast warnings, live previews, and copyable HTML or CSS embed snippets.
Sallen-Key Filter Calculator
Calculate Sallen-Key low-pass, high-pass, or band-pass stages locally with f0, Q, response curves, preferred values, and headroom checks.
Secure Shell (SSH) Client Config Editor
Edit an SSH client config in your browser, reorganize Host blocks, test wildcard matches, and review lint, security, and diff reports.
SemVer Bump Required Checker
Check release notes or commit subjects for the SemVer bump floor, compare a planned version, and flag breaking, feature, fix, and neutral signals.
Sitemap URL Extractor
Extract sitemap URLs from pasted XML, text files, or a public URL with filters, duplicate checks, source evidence, audit warnings, and exports.
Slug Generator
Generate readable URL, file, anchor, and CSS-ready slugs from titles or batch lines with Unicode handling, smart trimming, and paste checks.
Stack Trace Signature Analyzer
Group pasted stack traces into stable fingerprints, compare frame evidence, and spot recurring failures without sending trace text away.
TOML Converter
Turn TOML into target config formats with parse checks, key-path ledgers, type previews, and schema sketches for safer migrations.
Tab-Separated Values (TSV) Converter
Convert TSV or delimiter-separated rows into clean tables and typed exports with header detection, row warnings, and column profiles.
Table Data Converter
Turn pasted or local table files into clean Markdown, JSON, HTML, or delimited output with previews, header repair, and formula warnings.
Test Case Generator
Turn a feature workflow into manual, Gherkin, or automation-ready test cases with traceable IDs, boundary coverage, review checks, and exports.
Test Shard Runtime Calculator
Estimate CI test shard wall time from suite size, setup cost, timing coverage, runner capacity, target gaps, and runner-minute cost curves.
Text Diff Comparator
Compare original and revised text in your browser with ignore options, unified diff output, change tables, warnings, and exportable review data.
Thread Pool Saturation Calculator
Calculate thread pool saturation from active workers, queue depth, arrival rate, task time, wait percentiles, and capacity scenarios.
URL Encode and Decode Tool
Encode or decode URL text by context in your browser, inspect percent escapes and plus-space rules, and catch round-trip issues before copying.
URL Parser
Parse a URL or query string into components, query rows, encoding notes, masked sensitive values, a length profile, and a rebuilt review link.
Unicode Character Lookup
Inspect a character, grapheme, code point, or escape, then get Unicode names, U+ values, UTF bytes, normalization changes, and hidden-text warnings.
Universally Unique Identifier (UUID) Generator
Generate UUIDs in your browser for random, name-based, and time-ordered IDs with namespace checks, anatomy details, and history.
User Story Generator
Draft a user story from role, goal, benefit, and acceptance checks, then review criteria, boundaries, readiness warnings, and exports.
User-Agent Parser
Parse a User-Agent string or request header into browser, OS, device, bot, token, and Client Hints evidence for support or log review.
Voltage Divider Calculator
Calculate loaded voltage-divider output, solve R1 or R2 from a target voltage, and check load sag, current, power, tolerance, and E-series fit.
What Is My Browser
Identify your current browser, storage, graphics, privacy, and compatibility signals with share-ready support notes and exposure warnings.
What Is My Screen Resolution
Check screen resolution, viewport size, DPR, breakpoint fit, capture dimensions, and density warnings from your current browser session.
XML Diff Comparator
Compare two XML documents in your browser, catch parse errors, match repeated nodes by key or order, and review changed paths with exportable ledgers.
XPath Tester
Test XPath against XML or HTML in your browser, compare node or scalar results, and review namespace checks, match ledgers, and code snippets.
YAML Converter
Convert YAML into JSON, env, INI, properties, and path tables with local parsing, document checks, schema review, and scalar-only exports.
YAML Formatter
Format YAML in your browser, check parse warnings, path rows, change deltas, and JSON handoff data before replacing source text.
YAML Validator
Validate YAML text or files in your browser, catch parser errors and duplicate keys, and inspect document counts, paths, and parsed JSON.
cURL Command Generator
Build a shell-ready curl command from URL, method, headers, auth, body, retries, and timeouts with quoting, import parsing, and warnings.
npm Audit Summary Analyzer
Summarize npm audit JSON or CI text into a release gate, severity ledger, fix-pressure queue, charts, and local exports for handoff.